Slideshow that links to a directory

Hi,

I'm using Actionscript2 on Flash 8.

I'm trying to set up a slideshow for use on a homepage,
and want it to be super easy to maintain.

The plan is to have say 20 images on a loop, with crossfades between each image. I can do this by making a movieclip, no problem. What I would like is to have placeholders in a movieclip that link to a folder on my root, so that the photos can be changed without having to alter the .fla.

I imagine this is really easy, but don't know how to access this information.
I have tried using loadMovieNum in actionscript but to no avail.

Help!

Thanks,
Sam